code: def foo(self, **kwargs):
      pass
  
imports: import dataclasses
  import os
  import pytest
  import yaml
  from jina import Deployment, Flow, requests
  from jina.constants import __default_executor__
  from jina.excepts import BadConfigSource
  from jina.jaml import JAML, JAMLCompatible
  from jina.serve.executors import BaseExecutor
label_desc: Use image node_id 1 for calling the MyExec obj's underlying member method code with example usage: obj.foo() without return types